Improved bridge



- tiled ttttt DAVID MCCURDY, 0F OTTAWA, OHIO.

'Letters-Patent No. 104,868, lated June 28, 1870 alttellated .fm-ze 17, 1870.

IMPRQVED BRIDGE.

The Schedule referred to in these Letters Patent and making partof the same.

To all whom fit mag/*concern in county of Putnam and State ot Ohio, have invented certain new and useful-Improvements in Bridges; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon making a part of this specication.

The nature of my invention consists in the construction and arrangement of'an iron bridge, as will be hereinafter fully set forth. 4

' In order to enable others skilled. in the art to which my invention Vappertains to make and use the same, I will now proceed to describe its construction referring to the annexed drawing, in which- Figure 1 is a side view of an arch of my bridge; and

Figure 2 is a vertical cross-section .of the same.

My bridge is formed of arches or girders constructed of' railroad iron or approximate form.

A represents such T-rail clamped with bars or lishplates, B B, the entire length, as shown in Iig. 1.

f- The fish-plates o1'- clamps B B may be made in sections, and are, in the full sized bridge, made hall' oval, and of such size that, when the barsare spliced to the T-rail A, the iron will be twice as thick, and bolted by a suitable number of bolts, C C. y The base ofthe T-rail A to be somewhat wider and thicker than common railroad iron, so that the loops, clevises, or stirrups, D D, may pass through or be clamped up to it,

as shown bythe notches a a. The loops or stirrups D D are to be put on about'every jive feet, and, to prevent them from slipping down from their places on the arch, a bolt, C, is passed through just above each notch al, and at its side.

The chords E, to be ina-de of rods, or bars, or links, or wire-cables, the loops D D being placedloosely around, or may grasp the same firmly. The chords are secured at the ends by suitable nuts and jam-nuts, b, or keys passing outside at v,the ends of the shoes G G Having thus fully described my invention,

lVhat I claim as new, and desire to secure by Letters Patent, is

1. rI he combination of the arched lT-shaped rail A, sh-pieces B B, and bolts C, all substantially as set forth. 1

2. The combination of lthe stirrups D, rail A, and chord or chords E, all substantially as set forth.

3. In combination with T-railpA, having notches a' a,- barsor fishiplates B B and bolts C C, the loops or stirrups D, chords E, and shoes G, all constructed and arranged as described, substantially as and for the purposes herein set forth..

In testimony that I claim the foregoing, I .have

hereunto set my hand this ist day of November, 1869.

DAVID MCCURDY.

Witnesses:

J. J. MOORE, C. J. SWAN. 

